| 基于盾构隧道纵向沉降的纵向等效刚度反分析 |
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| 引用本文： | 殷建国,黄宏伟.基于盾构隧道纵向沉降的纵向等效刚度反分析[J].岩土力学,2015,36(Z1):230-234. |
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| 作者姓名： | 殷建国 黄宏伟 |
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| 作者单位： | 1. 同济大学 岩土及地下工程教育部重点实验室，上海 200092；2. 同济大学 地下建筑与工程系，上海 200092 |
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| 基金项目： | 国家自然科学基金（No.51278381）；国家重点基础研究发展计划（973计划）（No.2011CB013803）。 |
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| 摘 要： | 随着我国经济建设的深化，城市轨道交通建设得到迅速发展。在盾构隧道常见病害中，盾构隧道纵向沉降会对隧道纵向性能造成不利影响。盾构隧道结构刚度是结构性能的重要力学性能指标之一，采用盾构隧道纵向等效连续化模型，分别对于纵向等效刚度为常数以及沿盾构隧道纵向变化的情况，基于盾构隧道纵向沉降对纵向等效刚度进行反分析，探究盾构隧道纵向沉降对隧道纵向等效刚度的影响。分析得出，（1）当隧道纵向刚度有效率? 沿隧道纵向为常数时，随着实际沉降的增大，隧道纵向刚度有效率? 变小，且随着实际沉降的增大趋于平稳；（2）当隧道纵向刚度有效率 沿隧道纵向变化时,实际沉降与理论沉降之比小于1时，反算出得到的隧道纵向刚度有效率 沿纵向中间大，两边小;实际沉降与理论沉降之比大于1时，反算得到的隧道纵向刚度有效率 沿纵向中间小，两边大；（3）根据反算出的纵向刚度有效率 计算所得到的沉降曲线与实际沉降曲线有所差异。
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| 关 键 词： | 纵向沉降 盾构隧道 纵向等效连续化模型 反分析 |
| 收稿时间： | 2015-03-09 |
Back analysis of longitudinal equivalent rigidity of shield tunnel based on longitudinal settlement curve |
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| YIN Jian-guo,HUANG Hong-wei.Back analysis of longitudinal equivalent rigidity of shield tunnel based on longitudinal settlement curve[J].Rock and Soil Mechanics,2015,36(Z1):230-234. |
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| Authors: | YIN Jian-guo HUANG Hong-wei |
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| Institution: | 1. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China;
2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China |
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| Abstract: | The urban track traffic develops rapidly with the economic growth in China. Among the common diseases of shield tunnel, longitudinal settlement will put adverse influence on the longitudinal performance of shield tunnel. The structural stiffness of shield tunnel structure is one of the most important mechanical performance index. The longitudinal equivalent continuous model is adopted; and the longitudinal effective rigidity ratio is assumed to be constant and variable longitudinally. The longitudinal equivalent rigidity is back calculated based on settlement curve to analyze the influence of longitudinal settlement on the longitudinal equivalent rigidity of shield tunnel. The results indicate: (1) When the longitudinal equivalent rigidity is constant, the longitudinal effective rigidity ratio reduces and change to be steady as the ratio of actual settlement and theoretic settlement increases. (2) When the longitudinal effective rigidity ratio is variable longitudinally, the back-calculated at the middle part is larger than that at both ends less than 1; and the back-calculated at the middle part is smaller than that at both ends for are greater than1. (3) The settlement curve which is calculated based on back-calculated has some differences with the actual settlement curve. |
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| Keywords: | longitudinal settlement shield tunnel longitudinal equivalent continuous model back analysis |
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